NOTICE DATE: May 29, 2026

NOTICE TYPE: R-B052926-01 Outage - Retail

SHORT DESCRIPTION: Implementation of ERCOT Project PR533_01 MarkeTrak Tech Refresh API Re-Write

INTENDED AUDIENCE: TDSPs, LSEs

DAYS AFFECTED: Sunday, June 28, 2026, 08:00 through 23:59

LONG DESCRIPTION: ERCOT will be implementing changes associated with ERCOT Project PR533_01 (MarkeTrak Tech Refresh API Re-Write) in the ERCOT production environment on Sunday, June 28, 2026.

ADDITIONAL INFORMATION: 

• MarkeTrak will be unavailable for the duration of the outage.
• The changes associated with this project require API users to implement a new WSDL which will be available in the RMTE prior to Production implementation.  Additional details regarding RMTE availability will be communicated in a future Market Notice.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

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dg